Dynamic investigation of network restoration by the pumped-storage plant Markersbach in Germany

To restore a transmission network after blackout without predetermined voltage by neighbouring transmission systems, the restoration has to proceed from power-station units within the own network area. In small separate networks connecting electrical equipment and consumers can result in unstable operating conditions. Possibly tripped protective measures can cause the breakdown of the restored transmission system in the end. To investigate network restoration, a realistic dynamic model of the extra-high voltage system is needed on a simulation platform. In this way different scenarios of restoration can be analysed from technical points of view. Creating a complete dynamic network model, the dynamic models of the most significant supplying power plants are necessary. The paper presents the results of modelling the black-start capable pumped-storage plant (PSP) Markersbach that is located in eastern part of Germany. Basing on measurements in the PSP Markersbach a dynamic power-station model was developed and its parameters were identified. With the model of the power plant several restoration scenarios proceeding from PSP Markersbach can be investigated regarding their feasibility. This project is a part of cooperation between Vattenfall Europe Transmission GmbH (VE-T) and University of Rostock. The determined possibilities of a successful network restoration are going to be involved in a conception concerning the restoration of VE-T transmission system. This conception will also be used as instruction manual for employee training.